An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Grossman M, Koops WJ, den Daas JH.Grossman M, et al. Among authors: koops wj.J Dairy Sci. 1995 Dec;78(12):2871-6. doi: 10.3168/jds.S0022-0302(95)76917-X.J Dairy Sci. 1995.PMID: 8675769Free article.